Preparation of magnetic hollow ZSM-5/Ni composite spheres

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• 作者：Jinlong Jiang ; Jianfeng Yao ; Changfeng Zeng ; Lixiong Zhang ; Nanping Xu
• 关键词：Magnetic ; ZSM-5 ; Ni ; Hollow spheres
• 刊名：Microporous and Mesoporous Materials
• 出版年：2008
• 出版时间：1 July 2008
• 年：2008
• 卷：112
• 期：1-3
• 页码：450-457
• 全文大小：1271 K

文摘

This paper presents a method for the preparation of magnetic hollow ZSM-5/Ni composite spheres. ZSM-5/Ni/PS spheres were firstly synthesized by assembling ZSM-5 nanoparticles on the surfaces of Ni/PS spheres, followed by hydrothermal treatment to form a compact ZSM-5 layer. Magnetic hollow ZSM-5/Ni spheres were subsequently obtained by calcination and reduction of the ZSM-5/Ni/PS spheres. The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), thermogravimetry (TG), energy dispersive X-ray spectroscopy (EDX), temperature-programmed reduction (TPR) and a vibrating sample magnetometer (VSM). A continuous ZSM-5 layer with a thickness of 400 nm was formed on the surface of Ni/PS spheres after one cycle of adsorption of ZSM-5 nanoparticles and hydrothermal treatment at 80 °C for 36 h. By changing the hydrothermal treatment time, the thickness of zeolite layer can be controlled. The hollow ZSM-5/Ni spheres inherited magnetic property from the nickel layer and their magnetization value could be adjusted by varying the thickness of the nickel layers.